X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=OvmfPkg%2FInclude%2FProtocol%2FLegacy8259.h;fp=OvmfPkg%2FInclude%2FProtocol%2FLegacy8259.h;h=74bbb674ed293251dc2d4d885fcbc5c77139758b;hp=0000000000000000000000000000000000000000;hb=10fa47e538290bb22ff5de39bedcce1dd92d488f;hpb=9a86fd33e94142ee2a2989d9285bc92152b5f2f2 diff --git a/OvmfPkg/Include/Protocol/Legacy8259.h b/OvmfPkg/Include/Protocol/Legacy8259.h new file mode 100644 index 0000000000..74bbb674ed --- /dev/null +++ b/OvmfPkg/Include/Protocol/Legacy8259.h @@ -0,0 +1,291 @@ +/** @file + This protocol abstracts the 8259 interrupt controller. This includes + PCI IRQ routing needed to program the PCI Interrupt Line register. + +Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.
+SPDX-License-Identifier: BSD-2-Clause-Patent + + @par Revision Reference: + This protocol is defined in Framework for EFI Compatibility Support Module spec + Version 0.97. + +**/ + +#ifndef _EFI_LEGACY_8259_H_ +#define _EFI_LEGACY_8259_H_ + + +#define EFI_LEGACY_8259_PROTOCOL_GUID \ + { \ + 0x38321dba, 0x4fe0, 0x4e17, {0x8a, 0xec, 0x41, 0x30, 0x55, 0xea, 0xed, 0xc1 } \ + } + +typedef struct _EFI_LEGACY_8259_PROTOCOL EFI_LEGACY_8259_PROTOCOL; + +typedef enum { + Efi8259Irq0, + Efi8259Irq1, + Efi8259Irq2, + Efi8259Irq3, + Efi8259Irq4, + Efi8259Irq5, + Efi8259Irq6, + Efi8259Irq7, + Efi8259Irq8, + Efi8259Irq9, + Efi8259Irq10, + Efi8259Irq11, + Efi8259Irq12, + Efi8259Irq13, + Efi8259Irq14, + Efi8259Irq15, + Efi8259IrqMax +} EFI_8259_IRQ; + +typedef enum { + Efi8259LegacyMode, + Efi8259ProtectedMode, + Efi8259MaxMode +} EFI_8259_MODE; + +/** + Get the 8259 interrupt masks for Irq0 - Irq15. A different mask exists for + the legacy mode mask and the protected mode mask. The base address for the 8259 + is different for legacy and protected mode, so two masks are required. + + @param This The protocol instance pointer. + @param MasterBase The base vector for the Master PIC in the 8259 controller. + @param SlaveBase The base vector for the Slave PIC in the 8259 controller. + + @retval EFI_SUCCESS The new bases were programmed. + @retval EFI_DEVICE_ERROR A device error occured programming the vector bases. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_SET_VECTOR_BASE)( + IN EFI_LEGACY_8259_PROTOCOL *This, + IN UINT8 MasterBase, + IN UINT8 SlaveBase + ); + +/** + Get the 8259 interrupt masks for Irq0 - Irq15. A different mask exists for + the legacy mode mask and the protected mode mask. The base address for the 8259 + is different for legacy and protected mode, so two masks are required. + + @param This The protocol instance pointer. + @param LegacyMask Bit 0 is Irq0 - Bit 15 is Irq15. + @param LegacyEdgeLevel Bit 0 is Irq0 - Bit 15 is Irq15. + @param ProtectedMask Bit 0 is Irq0 - Bit 15 is Irq15. + @param ProtectedEdgeLevel Bit 0 is Irq0 - Bit 15 is Irq15. + + @retval EFI_SUCCESS 8259 status returned. + @retval EFI_DEVICE_ERROR Error reading 8259. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_GET_MASK)( + IN EFI_LEGACY_8259_PROTOCOL *This, + OUT UINT16 *LegacyMask, OPTIONAL + OUT UINT16 *LegacyEdgeLevel, OPTIONAL + OUT UINT16 *ProtectedMask, OPTIONAL + OUT UINT16 *ProtectedEdgeLevel OPTIONAL + ); + +/** + Set the 8259 interrupt masks for Irq0 - Irq15. A different mask exists for + the legacy mode mask and the protected mode mask. The base address for the 8259 + is different for legacy and protected mode, so two masks are required. + Also set the edge/level masks. + + @param This The protocol instance pointer. + @param LegacyMask Bit 0 is Irq0 - Bit 15 is Irq15. + @param LegacyEdgeLevel Bit 0 is Irq0 - Bit 15 is Irq15. + @param ProtectedMask Bit 0 is Irq0 - Bit 15 is Irq15. + @param ProtectedEdgeLevel Bit 0 is Irq0 - Bit 15 is Irq15. + + @retval EFI_SUCCESS 8259 status returned. + @retval EFI_DEVICE_ERROR Error writing 8259. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_SET_MASK)( + IN EFI_LEGACY_8259_PROTOCOL *This, + IN UINT16 *LegacyMask, OPTIONAL + IN UINT16 *LegacyEdgeLevel, OPTIONAL + IN UINT16 *ProtectedMask, OPTIONAL + IN UINT16 *ProtectedEdgeLevel OPTIONAL + ); + +/** + Set the 8259 mode of operation. The base address for the 8259 is different for + legacy and protected mode. The legacy mode requires the master 8259 to have a + master base of 0x08 and the slave base of 0x70. The protected mode base locations + are not defined. Interrupts must be masked by the caller before this function + is called. The interrupt mask from the current mode is saved. The interrupt + mask for the new mode is Mask, or if Mask does not exist the previously saved + mask is used. + + @param This The protocol instance pointer. + @param Mode The mode of operation. i.e. the real mode or protected mode. + @param Mask Optional interupt mask for the new mode. + @param EdgeLevel Optional trigger mask for the new mode. + + @retval EFI_SUCCESS 8259 programmed. + @retval EFI_DEVICE_ERROR Error writing to 8259. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_SET_MODE)( + IN EFI_LEGACY_8259_PROTOCOL *This, + IN EFI_8259_MODE Mode, + IN UINT16 *Mask, OPTIONAL + IN UINT16 *EdgeLevel OPTIONAL + ); + +/** + Convert from IRQ to processor interrupt vector number. + + @param This The protocol instance pointer. + @param Irq 8259 IRQ0 - IRQ15. + @param Vector The processor vector number that matches an Irq. + + @retval EFI_SUCCESS The Vector matching Irq is returned. + @retval EFI_INVALID_PARAMETER The Irq not valid. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_GET_VECTOR)( + IN EFI_LEGACY_8259_PROTOCOL *This, + IN EFI_8259_IRQ Irq, + OUT UINT8 *Vector + ); + +/** + Enable Irq by unmasking interrupt in 8259 + + @param This The protocol instance pointer. + @param Irq 8259 IRQ0 - IRQ15. + @param LevelTriggered TRUE if level triggered. FALSE if edge triggered. + + @retval EFI_SUCCESS The Irq was enabled on 8259. + @retval EFI_INVALID_PARAMETER The Irq is not valid. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_ENABLE_IRQ)( + IN EFI_LEGACY_8259_PROTOCOL *This, + IN EFI_8259_IRQ Irq, + IN BOOLEAN LevelTriggered + ); + +/** + Disable Irq by masking interrupt in 8259 + + @param This The protocol instance pointer. + @param Irq 8259 IRQ0 - IRQ15. + + @retval EFI_SUCCESS The Irq was disabled on 8259. + @retval EFI_INVALID_PARAMETER The Irq is not valid. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_DISABLE_IRQ)( + IN EFI_LEGACY_8259_PROTOCOL *This, + IN EFI_8259_IRQ Irq + ); + +/** + PciHandle represents a PCI config space of a PCI function. Vector + represents Interrupt Pin (from PCI config space) and it is the data + that is programmed into the Interrupt Line (from the PCI config space) + register. + + @param This The protocol instance pointer. + @param PciHandle The PCI function to return the vector for. + @param Vector The vector for the function it matches. + + @retval EFI_SUCCESS A valid Vector was returned. + @retval EFI_INVALID_PARAMETER PciHandle not valid. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_GET_INTERRUPT_LINE)( + IN EFI_LEGACY_8259_PROTOCOL *This, + IN EFI_HANDLE PciHandle, + OUT UINT8 *Vector + ); + +/** + Send an EOI to 8259 + + @param This The protocol instance pointer. + @param Irq 8259 IRQ0 - IRQ15. + + @retval EFI_SUCCESS EOI was successfully sent to 8259. + @retval EFI_INVALID_PARAMETER The Irq isnot valid. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_LEGACY_8259_END_OF_INTERRUPT)( + IN EFI_LEGACY_8259_PROTOCOL *This, + IN EFI_8259_IRQ Irq + ); + +/** + @par Protocol Description: + Abstracts the 8259 and APIC hardware control between EFI usage and + Compatibility16 usage. + + @param SetVectorBase + Sets the vector bases for master and slave PICs. + + @param GetMask + Gets IRQ and edge/level masks for 16-bit real mode and 32-bit protected mode. + + @param SetMask + Sets the IRQ and edge\level masks for 16-bit real mode and 32-bit protected mode. + + @param SetMode + Sets PIC mode to 16-bit real mode or 32-bit protected mode. + + @param GetVector + Gets the base vector assigned to an IRQ. + + @param EnableIrq + Enables an IRQ. + + @param DisableIrq + Disables an IRQ. + + @param GetInterruptLine + Gets an IRQ that is assigned to a PCI device. + + @param EndOfInterrupt + Issues the end of interrupt command. + +**/ +struct _EFI_LEGACY_8259_PROTOCOL { + EFI_LEGACY_8259_SET_VECTOR_BASE SetVectorBase; + EFI_LEGACY_8259_GET_MASK GetMask; + EFI_LEGACY_8259_SET_MASK SetMask; + EFI_LEGACY_8259_SET_MODE SetMode; + EFI_LEGACY_8259_GET_VECTOR GetVector; + EFI_LEGACY_8259_ENABLE_IRQ EnableIrq; + EFI_LEGACY_8259_DISABLE_IRQ DisableIrq; + EFI_LEGACY_8259_GET_INTERRUPT_LINE GetInterruptLine; + EFI_LEGACY_8259_END_OF_INTERRUPT EndOfInterrupt; +}; + +extern EFI_GUID gEfiLegacy8259ProtocolGuid; + +#endif